78 aptdm. 



and with an interrupted narrow white fringe on the apical margins 

 of the segments ; the apical segment with cinereous pile ; clothed 

 beneath with white pubescence in the middle, that at the sides 

 being black. 



Hah. Villa Nova. 



48. Megachile incongrua. 



Female. Length 4 lines. — Black, with the legs ferruginous. The 

 face densely covered with yellowish-white pubescence ; the cheeks 

 have a similar pubescence, but it is longer ; the tips of the man- 

 dibles ferruginous. The pubescence on the thorax is similar to 

 that on the head ; the mesothorax and scutellum closely and finely 

 punctured ; wings subhyaline, their apical margins and also the 

 marginal cell with a fuscous cloud, the nervures and tegulse ferru- 

 ginous. Abdomen shining, with the apical segment opaque, 

 covered with fine shallow punctures; the apical margins of the 

 segments with a narrow fringe of white pubescence, usually more 

 or less interrupted ; clothed beneath with white pubescence. 



Male. The same length as the female ; the legs ferruginous, but 

 more or less stained with fuscous, the tarsi black above and fringed 

 with white pubescence. The front clothed with fulvous pubes- 

 cence, the cheeks thickly bearded with pale pubescence ; the an- 

 terior tarsi simple, the trochanters with a sharp angular spine ; 

 wings as in the other sex. Abdomen oblong, the base deeply con- 

 cave, the margins of the segments constricted ; the apical margins 

 with a white fringe laterally ; the margin of the apical segment 

 rounded ; beneath, the segments have a thick white marginal 

 fringe. 



Hah. Tunantins. 



49. Megachile cornuta. 



Female. Length 6| lines. — Black ; the clypeus deeply incised, the 

 lateral angles produced into angulated compressed horns. The 

 face with short white pubescence ; the cheeks, the sides of the 

 thorax, and the legs with a short thin downy pubescence; the 

 sides of the metathorax with a white fringe ; wings hyaline, with 

 a fuscous cloud at their apex beyond the marginal cells, and which 

 also enters the marginal cell ; the tarsi fulvous beneath, their 

 apical joints ferruginous. Abdomen oblong; the apical margins 

 with narrow white fasciae; clothed beneath with pale fulvous 

 pubescence. 



Hah. Mendoza. 



50. Megachile anthidioides. 



Female. Length 5 lines. — Black ; the second, third, and fourth seg- 

 ments of the abdomen with a broad fringe on the apical margins, 

 laterally, of yellow pubescence. The flagellum fulvous beneath. 



